See also:

• Science: Math: Research: Open Problems  (4)

• The Knight's Tour Links Page - The goal is to travel with a knight around the chess board, landing on each square only once. Features web links of solutions to the game, including a solution" by Dan Thomasson.
• U of T Mathematics Network - Includes interactive games, problems and puzzles including the Monty Hall Problem and the Tower of Hanoi and questions pages with answers and discussion.